Arrangement in a valve actuator
US5992819A · kind A · utility
4Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1996 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Oct 4, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86163
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an arrangement in a valve actuator (101) operating on a valve stem (113) provided with a piston (114) so as to close or open the valve (111), and in order to arrive at a variable area type hydraulic piston/cylinder, it is according to the present invention suggested that in addition to the valve stem piston (114) there could be provided one or more supplemental pistons (124).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.